This circuit was obtained from Elektor magazine and published in the Encyclopedia of Electronic Circuits Vol 5 of 1995. Transistors are RF types that are still common today.
This oscillator can generate 2 to 10 MHz signals and was found in an American 1980s documentation. The...
This flasher was originally intended for Christmas tree lamps. The circuit is from 1974 and uses...
In the figure we have the way to add hysteresis to an operational amplifier. The relationship...